| 01 | Cadillac V-Series.R | Cadillac Racing | yellow/black (+red) | CADILLAC | Michelin | Mobil 1 | closed | mid |
| 1 | BMW M4 GT3 | Paul Miller Racing | grey/red/silver | IHeart RADIO/UIS/Paul Miller Auto Group | Michelin | | closed | front |
| 3 | Chevrolet Corvette C8 Z06 GT3.R | Corvette Racing by Pratt Miller Motorsports | yellow/black | OSHKOSH/Mobil 1/Sirius XM | Michelin | | closed | mid |
| 4 | Chevrolet Corvette C8 Z06 GT3.R | Corvette Racing by Pratt Miller Motorsports | yellow/black | OSHKOSH/Mobil 1/Sirius XM | Michelin | | closed | mid |
| 5 | Porsche 963 | Proton Competition Mustang Sampling | black (+gold) | Mustang Sampling/F.A.T. | Michelin | Motul | closed | mid |
| 6 | Porsche 963 | Porsche Penske Motorsport | red/white (+black) | PORSCHE 963/PENSKE/Ansys/TAG HEUER/HELLER | Michelin | | closed | mid |
| 7 | Porsche 963 | Porsche Penske Motorsport | red/white/black | PORSCHE 963/PENSKE/Ansys/TAG HEUER/HELLER | Michelin | | closed | mid |
| 9 | McLaren 720S GT3 Evo | Pfaff Motorsports | orange/black (+blue) | driveway.com/MOTUL/MOTOMASTER/McLaren Toronto | Michelin | | closed | mid |
| 10 | Acura ARX-06 | Wayne Taylor Racing with Andretti | blue/black | KONICA MINOLTA/ACURA/HRC | Michelin | | closed | mid |
| 12 | Lexus RC F GT3 | Vasser Sullivan | black/yellow | SealMaster/Mark Levinson/molex | Michelin | | closed | front |
| 13 | Chevrolet Corvette C8 Z06 GT3.R | AWA | black/yellow | ORLANDOCORP.COM/OMP | Michelin | | closed | mid |
| 14 | Lexus RC F GT3 | Vasser Sullivan | black/yellow | SealMaster/Mark Levinson/molex | Michelin | | closed | front |
| 23 | Aston Martin Vantage AMR GT3 Evo | Heart of Racing Team | blue (+yellow) | THE HEART OF RACING | Michelin | | closed | front |
| 24 | BMW M Hybrid V8 | BMW M Team RLL | white/blue/red | BMW of North America/Puma | Michelin | | closed | mid |
| 25 | BMW M Hybrid V8 | BMW M Team RLL | white/blue/red | BMW of North America/Puma | Michelin | | closed | mid |
| 27 | Aston Martin Vantage AMR GT3 Evo | Heart of Racing Team | blue (+yellow) | THE HEART OF RACING | Michelin | | closed | front |
| 31 | Cadillac V-Series.R | Whelen Cadillac Racing | red/black (+white/yellow) | WHELEN/CADILLAC | Michelin | Mobil 1 | closed | mid |
| 32 | Mercedes-AMG GT3 | Korthoff/Preston Motorsports | grey/blue | | Michelin | | closed | front |
| 34 | Ferrari 296 GT3 | Conquest Racing | white/red (+black) | CORSA HORIZON | Michelin | | closed | mid |
| 40 | Acura ARX-06 | Wayne Taylor Racing with Andretti | red/black | DEX Imaging/ACURA/HRC/GAINBRIDGE | Michelin | | closed | mid |
| 43 | Porsche 992 GT3 R | Andretti Motorsports | grey/white (+green) | GALLANT/MI/Window World | Michelin | | closed | rear |
| 45 | Lamborghini Huracán GT3 Evo2 | Wayne Taylor Racing with Andretti | black/red | DEX imaging/GAINBRIDGE/Lamborghini Palm Beach | Michelin | | closed | mid |
| 55 | Ford Mustang GT3 | Proton Competition | blue/white | 1st Phorm/FORD PERFORMANCE | Michelin | | closed | front |
| 57 | Mercedes-AMG GT3 | Winward Racing | black/blue/pink | FIRST HORIZON/TECHEMET | Michelin | | closed | front |
| 64 | Ford Mustang GT3 | Ford Multimatic Motorsports | yellow/red/blue (+white) | FORD PERFORMANCE/Multimatic | Michelin | | closed | front |
| 65 | Ford Mustang GT3 | Ford Multimatic Motorsports | yellow/red/blue (+white) | FORD PERFORMANCE/Multimatic | Michelin | | closed | front |
| 66 | Acura NSX GT3 | Gradient Racing | white/green | JG WENTWORTH 877CASHNOW.COM/ACURA/HRC | Michelin | | closed | mid |
| 70 | McLaren 720S GT3 Evo | Inception Racing | red/black | Pedal Mafia/AVORAK | Michelin | | closed | mid |
| 77 | Porsche 992 GT3 R | AO Racing | green | Multimatic | Michelin | | closed | rear |
| 78 | Lamborghini Huracán GT3 Evo2 | Forte Racing | green/black (+purple) | GoBolt/O'GARA/Change Racing/EVTEC | Michelin | | closed | mid |
| 85 | Porsche 963 | JDC-Miller MotorSports | yellow (+black) | JDC/PORSCHE/TROFI PACK/S3s/wiha | Michelin | Motul | closed | mid |
| 86 | Porsche 992 GT3 R | MDK Motorsports | red/yellow/black | DERUN ENVIRONMENT/EASE | Michelin | | closed | rear |
| 120 | Porsche 992 GT3 R | Wright Motorsports | green/yellow | Griiip/APS | Michelin | | closed | rear |
| 557 | BMW M4 GT3 | Turner Motorsport | white/red/blue | LIQUI MOLY/TURNER/Belle Haven/H&R/PROCORE | Michelin | | closed | front |